import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: ${USER}
 * Date: ${YEAR}-${MONTH}-${DAY}
 * Time: ${TIME}
 */
public class Main {
    public static void main(String[] args) {
        System.out.println("请输入一个年龄>");
        Scanner scan = new Scanner(System.in);
        int age = scan.nextInt();
        if(age <= 18){
            System.out.println("少年");
        }
        else if(age <= 28 ){
            System.out.println("青年");
        }
        else if(age <= 55){
            System.out.println("中年");
        }else{
            System.out.println("老年");

        }
    }
}